Posted by Kelvin McDowell from a3a40755.sympatico.bconnected.net (209.53.4.93)on March 29, 1999 at 02:21:37:
In Reply to: Quaternion orientations posted by Greg O'Sullivan on March 27, 1999 at 23:14:36:
You're missing a piece of information. With an objects position and the position of a point to face you still have one degree of freedom of rotation around an axis pointing from the object to the point.
You might find it easiest to find the euler angles or sperical coordinates then convert those to a quaternion. Check out:
The Matrix (and Quaternion) Faq